core/src/main/java/io/seata/core/context/FastThreadLocalContextCore.java
<reponame>tyc1210/seata-1<filename>core/src/main/java/io/seata/core/context/FastThreadLocalContextCore.java/*
 *  Copyright 1999-2019 Seata.io Group.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package io.seata.core.context;

import io.netty.util.concurrent.FastThreadLocal;
import io.seata.common.loader.LoadLevel;

import java.util.HashMap;
import java.util.Map;

/**
 * The type Fast Thread local context core.
 *
 * @author ph3636
 */
@LoadLevel(name = "FastThreadLocalContextCore", order = Integer.MIN_VALUE + 1)
public class FastThreadLocalContextCore implements ContextCore {

    private FastThreadLocal<Map<String, String>> fastThreadLocal = new FastThreadLocal<Map<String, String>>() {
        @Override
        protected Map<String, String> initialValue() {
            return new HashMap<String, String>();
        }
    };

    @Override
    public String put(String key, String value) {
        return fastThreadLocal.get().put(key, value);
    }

    @Override
    public String get(String key) {
        return fastThreadLocal.get().get(key);
    }

    @Override
    public String remove(String key) {
        return fastThreadLocal.get().remove(key);
    }

    @Override
    public Map<String, String> entries() {
        return fastThreadLocal.get();
    }
}